It’s called Elasty and it was created by designer Yoori Koo. It’s a silicone bumper fitted with elastic strips which allow you to stash your headphones, pens, cards etc. on the back of the phone. brilliant for the gym!
JoeyBra The first sexy & comfortable pocket bra. JoeyBra gives you the freedom to go anywhere, do anything, and carry anything without lugging a purse. Discreetly holds a cellphone, ID, and key on the side of your bra with easy access. I can make this!